/* initGeetest 1.0.0
 * 用于加载id对应的验证码库，并支持宕机模式
 * 暴露 initGeetest 进行验证码的初始化
 * 一般不需要用户进行修改
 */
(function(global, factory) {
  'use strict';
  if (typeof module === 'object' && typeof module.exports === 'object') {
    // CommonJS
    module.exports = global.document
      ? factory(global, true)
      : function(w) {
          if (!w.document) {
            throw new Error('Geetest requires a window with a document');
          }
          return factory(w);
        };
  } else {
    factory(global);
  }
})(typeof window !== 'undefined' ? window : this, function(window, noGlobal) {
  'use strict';
  if (typeof window === 'undefined') {
    throw new Error('Geetest requires browser environment');
  }
  var document = window.document;
  var Math = window.Math;
  var head = document.getElementsByTagName('head')[0];

  function _Object(obj) {
    this._obj = obj;
  }

  _Object.prototype = {
    _each: function(process) {
      var _obj = this._obj;
      for (var k in _obj) {
        if (_obj.hasOwnProperty(k)) {
          process(k, _obj[k]);
        }
      }
      return this;
    },
  };
  function Config(config) {
    var self = this;
    new _Object(config)._each(function(key, value) {
      self[key] = value;
    });
  }

  Config.prototype = {
    api_server: 'api.geetest.com',
    protocol: 'http://',
    type_path: '/gettype.php',
    fallback_config: {
      slide: {
        static_servers: ['static.geetest.com', 'dn-staticdown.qbox.me'],
        type: 'slide',
        slide: '/static/js/geetest.0.0.0.js',
      },
      fullpage: {
        static_servers: ['static.geetest.com', 'dn-staticdown.qbox.me'],
        type: 'fullpage',
        fullpage: '/static/js/fullpage.0.0.0.js',
      },
    },
    _get_fallback_config: function() {
      var self = this;
      if (isString(self.type)) {
        return self.fallback_config[self.type];
      } else if (self.new_captcha) {
        return self.fallback_config.fullpage;
      } else {
        return self.fallback_config.slide;
      }
    },
    _extend: function(obj) {
      var self = this;
      new _Object(obj)._each(function(key, value) {
        self[key] = value;
      });
    },
  };
  var isNumber = function(value) {
    return typeof value === 'number';
  };
  var isString = function(value) {
    return typeof value === 'string';
  };
  var isBoolean = function(value) {
    return typeof value === 'boolean';
  };
  var isObject = function(value) {
    return typeof value === 'object' && value !== null;
  };
  var isFunction = function(value) {
    return typeof value === 'function';
  };
  var callbacks = {};
  var status = {};
  var random = function() {
    return parseInt(Math.random() * 10000) + new Date().valueOf();
  };
  var loadScript = function(url, cb) {
    var script = document.createElement('script');
    script.charset = 'UTF-8';
    script.async = true;
    script.onerror = function() {
      cb(true);
    };
    var loaded = false;
    script.onload = script.onreadystatechange = function() {
      if (
        !loaded &&
        (!script.readyState || 'loaded' === script.readyState || 'complete' === script.readyState)
      ) {
        loaded = true;
        setTimeout(function() {
          cb(false);
        }, 0);
      }
    };
    script.src = url;
    head.appendChild(script);
  };
  var normalizeDomain = function(domain) {
    return domain.replace(/^https?:\/\/|\/$/g, '');
  };
  var normalizePath = function(path) {
    path = path.replace(/\/+/g, '/');
    if (path.indexOf('/') !== 0) {
      path = '/' + path;
    }
    return path;
  };
  var normalizeQuery = function(query) {
    if (!query) {
      return '';
    }
    var q = '?';
    new _Object(query)._each(function(key, value) {
      if (isString(value) || isNumber(value) || isBoolean(value)) {
        q = q + encodeURIComponent(key) + '=' + encodeURIComponent(value) + '&';
      }
    });
    if (q === '?') {
      q = '';
    }
    return q.replace(/&$/, '');
  };
  var makeURL = function(protocol, domain, path, query) {
    domain = normalizeDomain(domain);

    var url = normalizePath(path) + normalizeQuery(query);
    if (domain) {
      url = protocol + domain + url;
    }

    return url;
  };
  var load = function(protocol, domains, path, query, cb) {
    var tryRequest = function(at) {
      var url = makeURL(protocol, domains[at], path, query);
      loadScript(url, function(err) {
        if (err) {
          if (at >= domains.length - 1) {
            cb(true);
          } else {
            tryRequest(at + 1);
          }
        } else {
          cb(false);
        }
      });
    };
    tryRequest(0);
  };
  var jsonp = function(domains, path, config, callback) {
    if (isObject(config.getLib)) {
      config._extend(config.getLib);
      callback(config);
      return;
    }
    if (config.offline) {
      callback(config._get_fallback_config());
      return;
    }
    var cb = 'geetest_' + random();
    window[cb] = function(data) {
      if (data.status === 'success') {
        callback(data.data);
      } else if (!data.status) {
        callback(data);
      } else {
        callback(config._get_fallback_config());
      }
      window[cb] = undefined;
      try {
        delete window[cb];
      } catch (e) {}
    };
    load(
      config.protocol,
      domains,
      path,
      {
        gt: config.gt,
        callback: cb,
      },
      function(err) {
        if (err) {
          callback(config._get_fallback_config());
        }
      }
    );
  };
  var throwError = function(errorType, config) {
    var errors = {
      networkError: '网络错误',
    };
    if (typeof config.onError === 'function') {
      config.onError(errors[errorType]);
    } else {
      throw new Error(errors[errorType]);
    }
  };
  var detect = function() {
    return !!window.Geetest;
  };
  if (detect()) {
    status.slide = 'loaded';
  }
  var initGeetest = function(userConfig, callback) {
    var config = new Config(userConfig);
    if (userConfig.https) {
      config.protocol = 'https://';
    } else if (!userConfig.protocol) {
      config.protocol = window.location.protocol + '//';
    }
    jsonp([config.api_server || config.apiserver], config.type_path, config, function(newConfig) {
      var type = newConfig.type;
      var init = function() {
        config._extend(newConfig);
        callback(new window.Geetest(config));
      };
      callbacks[type] = callbacks[type] || [];
      var s = status[type] || 'init';
      if (s === 'init') {
        status[type] = 'loading';
        callbacks[type].push(init);
        load(
          config.protocol,
          newConfig.static_servers || newConfig.domains,
          newConfig[type] || newConfig.path,
          null,
          function(err) {
            if (err) {
              status[type] = 'fail';
              throwError('networkError', config);
            } else {
              status[type] = 'loaded';
              var cbs = callbacks[type];
              for (var i = 0, len = cbs.length; i < len; i = i + 1) {
                var cb = cbs[i];
                if (isFunction(cb)) {
                  cb();
                }
              }
              callbacks[type] = [];
            }
          }
        );
      } else if (s === 'loaded') {
        init();
      } else if (s === 'fail') {
        throwError('networkError', config);
      } else if (s === 'loading') {
        callbacks[type].push(init);
      }
    });
  };
  window.initGeetest = initGeetest;
  return initGeetest;
});
